SiC Optical Window
The optical window is the core indicator of a material’s ability to transmit light within a specific wavelength range, directly determining the operating band and performance boundary of photonic devices. Silicon carbide (SiC), as an emerging wide bandgap semiconductor material, is reshaping the technological landscape of integrated photonics with its ultra wide optical transparent window from ultraviolet to mid infrared (0.37-5.6um), providing unprecedented material platforms for fields such as nonlinear optics, quantum communication, and high-precision sensing. PAM-XIAMEN is available to provide SiC optical window, with the following parameters for reference:
1. SiC Optical Window Parameters
| Item | SiC Substrate |
| Polytype | 4H、6H、3C |
| Size | 2~6inch, 5 x 5 mm² or customized |
| Thickness | 0.5mm or customized |
| Surface Finish | DSP |
| Surface roughness | <0.5nm |
2. Why Is SiC Substrate Used as an Optical Window?
SiC has a wide bandgap, which means it can remain transparent over a wide spectral range. This enables SiC windows to be used for various optical applications, including visible light, ultraviolet, and infrared bands. Secondly, SiC is the second hardest material after diamond, with extremely high wear resistance and scratch resistance, which enables SiC windows to maintain stable optical performance in harsh environments. SiC can change its optical properties, such as refractive index and absorption spectrum, through doping, which allows researchers to customize SiC windows for specific applications. In addition, research results indicate that SiC has comparable loss characteristics to CVD diamond and is more affordable, making it a potential substitute for its microwave tube window material.
Actually, researchers have found that the 4H-SiC crystal structure exhibits excellent performance in the terahertz frequency range (0.1-10 THz). This material not only has high transparency in the high-frequency band, but also has extremely low intrinsic loss characteristics that can control terahertz wave attenuation to a minimum range, significantly improving device energy efficiency. The high damage threshold enables it to withstand direct irradiation of high-intensity terahertz lasers, which has critical value in strong field physics experiments. Meanwhile, its high-strength lattice structure endows it with excellent bending and fracture resistance, allowing it to maintain functional integrity even in complex stress environments. In terms of chemical stability, the material can maintain its surface properties even in harsh environments such as humidity and corrosive gases, avoiding the common performance degradation phenomenon of traditional optical materials.
Whether you need SiC substrate for research or for industrial applications, please contact us email at [email protected] and [email protected].